Fault indicator (FI)

Fault indicators (FIs) are essential devices deployed in power distribution networks to detect and report line faults such as short circuits, open circuits and abnormal current conditions. These modules often include sensitive sensing circuits and communication interfaces that operate continuously in electrically noisy and transient-prone environments. Surge transients from switching events, lightning-induced voltage spikes, and electrostatic discharge (ESD) during field installation pose significant risks to FI electronics, potentially distorting measured signals or damaging control circuits.

YINT Electronics’ fault indicator protection solution applies a coordinated transient suppression architecture combining ultra-fast transient voltage suppressors (TVS), low-capacitance ESD protection arrays and targeted surge protection devices. By integrating these elements at key power and signal entry points, the solution enhances immunity to overvoltage events, preserves signal integrity under transient stress, improves communication reliability and ensures long-term operational stability for fault indicator systems in complex distribution environments.